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Q.

The rusting of iron cannot be prevented by _____________.

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a

painting

b

galvanising

c

chrome plating

d

keeping iron in water

answer is D.

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Detailed Solution

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  • Rusting of iron takes place when iron comes in contact with air or moisture. 
  • It can be prevented by cutting off contact between iron and air and moisture.
  • Painting, galvanising and chrome plating are the methods by which contact with moisture and air can be cut off, so they help in preventing rust. 
  • But keeping iron in water will cause rusting so it is not the correct method.

 

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